Changing the PHP version usually takes a few seconds to a minute. We recommend that you test your scripts after the change. For possible problems we have compiled Frequent Error Messages for PHP Scripts and recommendations for possible solutions. You can undo the changes in your PHP version at any time.

Please note:

You do not have to cancel 1&1 PHP Extended Support separately if you switch to a current version of PHP with all domains during the free phase. 1&1 PHP Extended Support will then automatically expire at the end of the free phase.

The advantages of a current PHP version

Switching to a current PHP version has many advantages for your website - for example:

With PHP 7 and OpCache, WordPress Web sites run more than twice as fast as PHP 5.6